Wusung Radio Tower is a 321 metres tall guyed mast situated at Wusong near Shanghai. Wusung Radio Mast was built in the 1930s and was at the time of inauguration the world's second tallest architectural structure after the Empire State Building.
References
Book: "Ein Riese unter Riesen" ( Page 33), Aufstieg und Fall des Deutschlandsenders III in Herzberg/Elster, Helmut Knuppe, Leipziger Verlagsgesellschaft, ISBN 3-910143-85-7